/Engine/Source/Runtime/Engine/Classes/DeviceProfiles/DeviceProfileManager.h
e.g. "Fragment1,Fragment2,[tag]Fragment3"
csv string of the current matched fragments.
const [FString](API\Runtime\Core\Containers\FString) GetActiveDeviceProfileMatchedFragmentsString ( bool bEnabledOnly, bool bIncludeTags, bool bAlphaSort )